Dr. Paolo S. Scalia Profile

Dr. Paolo S. Scalia

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Proceedings Article | 15 October 2012 Paper

New approach to spectral features modeling

Hedser van Brug, Paolo Scalia

Proceedings Volume 8510, 85100G (2012) https://doi.org/10.1117/12.931497

KEYWORDS: Diffusers, Speckle, Sun, Speckle pattern, Spectrometers, Sensors, Scattering, Spectral models, Light scattering, Polarization

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The origin of spectral features, speckle effects, is explained, followed by a discussion on many aspects of spectral features generation. The next part gives an overview of means to limit the amplitude of the spectral features. This paper gives a discussion of all means to reduce the spectral features amplitude (SFA), i.e. inner pixel averaging, coherence effects, and angular averaging, and to a lesser extend coherence effects and polarization. A new approach to model spectral features is presented, that is based on the averaging mechanisms, in a similar way as is used for speckle patterns. Formulae for all averaging methods are given and the use is discussed. The paper starts off with a short description on Spectral Features as observed in earth observation spectrometers, followed by speckle effects and averaging mechanisms. Next the origin of the averaging mechanisms in a spectrometer are given and a method to calculate them.

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